In a life-and-death race against time, Queens Detective Charles Lopresti rescued a barely breathing woman after her frantic mother called from Hawaii pleading for help for her suicidal daughter — but didn’t know exactly where the daughter was.

When Lopresti answered the phone at Jamaica’s 103rd Precinct detective squad on July 17, Beth Walz told him her flight-attendant daughter, Averie Kenery, called from Queens and told relatives “she was going to kill herself. She took a bunch of pills. She wanted us to kiss the children goodbye for her,” he recounted.

Kenery’s family, who knew only that she was staying at a flight-crew apartment near Hillside Avenue and Lefferts Boulevard, had called 911 — but dispatchers needed an exact address. Relatives began randomly dialing precincts — and reached Lopresti.

Walz told him the 33-year-old mother of two had stopped talking, but her cellphone line was still open.

“I figured she was going unconscious and I had to get there,” said Lopresti, who has been nominated for a Finest Liberty Medal by the NYPD.

“We jumped in a car, three other detectives and myself,” and raced to Forest Hills.

When they got to the intersection, they saw a flight attendant walking to a Victorian-style house.

“I ran over. I asked, ‘Is this a crash pad for Delta Air Line stewardesses?’ ” She said yes.

They didn’t find her, but then they got a call from a detective at the station house who said the mother in Hawaii was still listening to her daughter’s phone, “and she heard you yelling her daughter’s name so the phone must be there.”

They found Kenery, less than an hour after getting her mom’s desperate call, and she was “totally unconcious,” said Lopresti. EMS determined “she was in respiratory arrest,” he said.

Lopresti, who suffered a separated shoulder and a broken toe from kicking in two doors, went to visit Kenery at the hospital as she recovered. “She mouthed ‘thank you,’ ” he said.